I used paints4u.com for touch up and the filled stone chips on the bonnet are now invisible and my roof gutter seam (fixed boot leak) matched just right. I was worried that my pearlescent paint would be tricky but turned out fine. Not used their spray but reluctant to try after terrible efforts on an old car where the sheen just did not match and the area stood out a mile. All our cars are base colour + lacquer so any spraying has to be cut, compounded and polished to be vaguely successful. My stone chips were painted in the hole then topped up with lacquer over a couple of days before getting buffed smooth. The small paint spears are miles better than the tippex style brush.
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TG